<template>
  <el-row class="login-container" type="flex" justify="center">
    <el-col :span="8">
      <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" autocomplete="on"
        label-position="left">

        <div class="title-container">
          <h3 class="title">卖家登录</h3>
        </div>

        <el-form-item prop="username">
          <el-input ref="username" v-model="loginForm.username" placeholder="账户号码" name="username" type="text" tabindex="1"
            autocomplete="off" />
        </el-form-item>

        <el-tooltip v-model="capsTooltip" content="大写锁定打开" placement="left" manual>
          <el-form-item prop="password">
            <el-input :key="passwordType" ref="password" v-model="loginForm.password" :type="passwordType" placeholder="密码"
              name="password" tabindex="2" autocomplete="off
           " @keyup.native="checkCapslock" @blur="capsTooltip = false"
              @keyup.enter.native="handleLogin" show-password />
          </el-form-item>
        </el-tooltip>
        <div style="margin-bottom: 20px;text-align: center;">
          <el-checkbox v-model="autoLogin" style="color: white;">下次自动登录</el-checkbox>
        </div>

        <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登录</el-button>
      </el-form>
    </el-col>
  </el-row>
</template>

<script>
  const axios = require('axios');
  export default {
    name: 'Login',
    data() {
      const validateUsername = (rule, value, callback) => {
        if (value.trim() === '') {
          callback(new Error('请填写账户'));
        } else {
          callback();
        }
      }
      const validatePassword = (rule, value, callback) => {
        if (value.trim() === '') {
          callback(new Error('请填写密码'))
        } else if (value.trim().length < 6) {
          callback(new Error('密码必须在6到18位之间'))
        } else if (value.split(' ').length >= 2) {
          callback(new Error('密码不能包含空格'))
        } else {
          callback()
        }
      }
      return {
        loginForm: {
          username: '',
          password: ''
        },
        loginRules: {
          username: [{
            required: true,
            trigger: 'blur',
            validator: validateUsername
          }],
          password: [{
            required: true,
            trigger: 'blur',
            validator: validatePassword
          }]
        },
        autoLogin: false,
        passwordType: 'password',
        capsTooltip: false,
        loading: false,
        showDialog: false,
        redirect: undefined,
        otherQuery: {}
      }
    },
    watch: {
      $route: {
        handler: function(route) {
          const query = route.query
          if (query) {
            this.redirect = query.redirect
            this.otherQuery = this.getOtherQuery(query)
          }
        },
        immediate: true
      }
    },
    beforeCreate() {
      let autoLogin = window.localStorage.getItem('autoLogin')
      if (autoLogin !== undefined && autoLogin !== null) {
        this.$store.dispatch('login', {
          username: JSON.parse(autoLogin).username,
          password: JSON.parse(autoLogin).password
        }).then((res) => {
          if (res === true) {
            this.$router.push({
              path: '/personalCenter'
            })
          } else {
            this.$message({
              message: '登录失败',
              type: 'error',
              center: true,
              duration: 1500
            });
          }

        })
      }
    },
    methods: {
      checkCapslock(e) {
        const {
          key
        } = e
        this.capsTooltip = key && key.length === 1 && (key >= 'A' && key <= 'Z')
      },
      sendLoginRequest(username, password) {
        this.$store.dispatch('login', {
          username: username,
          password: password
        }).then((res) => {
          this.afterDoLogin(res)
        })
        this.loading = false;
      },
      afterDoLogin(res) {
        if (res === true) {
          if (window.localStorage.getItem('autoLogin') === null) {
            if (this.autoLogin) {
              window.localStorage.setItem('autoLogin', JSON.stringify({
                username: this.loginForm.username,
                password: this.loginForm.password
              }))
            } else {
              window.localStorage.removeItem('autoLogin')
            }
            this.$message({
              message: '登录成功',
              type: 'success',
              center: true,
              duration: 1000
            });
          }
          this.$store.commit('CHENGE_ACTIVE_SIDEBAR','/personalCenter/personInfo')
          setTimeout(() => {
            this.$router.push({
              path: '/personalCenter'
            })
          }, 1000)
        } else {
          this.$message({
            message: '登录失败',
            type: 'error',
            center: true,
            duration: 1500
          });
        }
      },
      handleLogin() {
        this.$refs.loginForm.validate(valid => {
          if (valid) {
            this.loading = true
            //发出登陆请求
            this.sendLoginRequest(this.loginForm.username, this.loginForm.password)
          } else {
            this.$message({
              message: '请检查表单',
              type: 'error',
              center: true,
              duration: 1500
            });
            return false
          }
        })
      },
      getOtherQuery(query) {
        return Object.keys(query).reduce((acc, cur) => {
          if (cur !== 'redirect') {
            acc[cur] = query[cur]
          }
          return acc
        }, {})
      }
    }
  }
</script>
<style lang="scss">
  /* 修复input 背景不协调 和光标变色 */
  /* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */
  $bg:#283443;
  $light_gray:#fff;
  $cursor: #fff;

  @supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
    .login-container .el-input input {
      color: $cursor;
    }
  }

  /* reset element-ui css */
  .login-container {
    .el-input {
      display: inline-block;

      // height: 47px;
      input {
        background: transparent;
        border: 0px;
        -webkit-appearance: none;
        border-radius: 0px;
        padding: 12px 5px 12px 15px;
        color: $light_gray;
        height: 47px;
        caret-color: $cursor;

        &:-webkit-autofill {
          box-shadow: 0 0 0px 1000px $bg inset !important;
          -webkit-text-fill-color: $cursor !important;
        }
      }
    }

    .el-form-item {
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(0, 0, 0, 0.1);
      border-radius: 5px;
      color: #454545;
    }
  }
</style>
<style lang="scss" scoped>
  $bg:#2d3a4b;
  $dark_gray:#889aa4;
  $light_gray:#eee;

  .login-container {
    min-height: 100%;
    width: 100%;
    background-color: $bg;
    overflow: hidden;

    .login-form {
      position: relative;
      width: 520px;
      max-width: 100%;
      padding: 35px;
      margin: 0 auto;
      overflow: hidden;
    }

    .tips {
      font-size: 14px;
      color: #fff;
      margin-bottom: 10px;

      span {
        &:first-of-type {
          margin-right: 16px;
        }
      }
    }

    .svg-container {
      padding: 6px 5px 6px 15px;
      color: $dark_gray;
      vertical-align: middle;
      width: 30px;
      display: inline-block;
    }

    .title-container {
      position: relative;

      .title {
        font-size: 26px;
        color: $light_gray;
        margin: 0px auto 40px auto;
        text-align: center;
        font-weight: bold;
      }
    }

    .show-pwd {
      position: absolute;
      right: 10px;
      top: 7px;
      font-size: 16px;
      color: $dark_gray;
      cursor: pointer;
      user-select: none;
    }

    .thirdparty-button {
      position: absolute;
      right: 0;
      bottom: 6px;
    }

    @media only screen and (max-width: 470px) {
      .thirdparty-button {
        display: none;
      }
    }
  }
</style>
